Essentials
Passport (Best left in your hotel safe when you arrive. You wouldn't want anyone to find out your Gaydar age isn't real)
ID
Money (Euros work best)
Wallet (Scots will feel right at home in Sitges. Catalonians have the same reputation in Spain)
Credit cards
Bank/Cash cards
Travelers cheques/checks
Airline Ticket/s
Hotel booking slip

Toys
Mobile/Cell phone
Mobile/Cell phone battery charger
Mobile/Cell phone USB cable
Address book (To send your 'wish you were here' post cards)
Lap top (To check GaySitges.com daily)
Lap top battery charger
Camera
Camera battery charger
Camera USB cable
Camera memory stick/s
MP4 player & Headphones
MP4 battery charger or batteries
DVD player
DVD player battery charger
DVD player headphones
DVDs

Beauty
Swimwear (Designer)
Underwear (Designer)
Shorts
Socks
Shoes
Flip flops
Trousers/Pants
Shirts
T-shirts
Cap
Watch
Jewelry
Piercings
Cock rings
Tooth brush
Tooth paste
Cologne
Hand & Face creams
Scissors & Tweezers
Nail file & cutters
Glasses
Eye lenses
Dentures or any other removable body bits
Medication

Beach
Sun tan lotion
Towels (Preferably in the colours of the rainbow flag)
Air bed
Books/Magazines

Fun
Condoms (Bring plenty. They're not given out in bars)
Lube (Ditto)
Dildo (Though hopefully you won't need it)
Viagra/Cialis.
Party supplies (I of course mean things like hand lasers!)

Don't forget to take the pages you printed from GaySitges.com

Things not to bring
Umbrella
Rain coat
Wellington boots
Tesco/Wall Mart swimwear or underwear
Your house keys (Leave them with friends or family) (Did you remember to tell someone where you're going too?)
Party supplies (Don't you know hand lasers are illegal?)
Your boyfriend